If you remove one from eleven, it becomes ten. If you remove one from nine, it becomes ten.

How is this possible?

A professor thinks of two consecutive numbers between 1 and 10.
'A' knows the 1st number and 'B' knows the second number

A: I do not know your number.
B: Nor do I know your number.
A: Now I know.

What are the four solutions for this?

What you cannot hold but it is yours?

You are given four results as below:
1111 = F
2222 = E
3333 = T
Then, can you find out how to code 4444?

On one occasion, A Boy collects 71 rupees in form of 20 paise and 25 paise. He collects a total of 324 coins.

Can you tell me how many 20-paisa and 25-paisa he got?

A seven-year-old kid challenged his classmates that he can make the number one disappear by adding something to it.

How can he do that?

How many times can you subtract the number 5 from 25?

An express train takes 3 seconds to enter the tunnel which is 1 km long.
If it is travelling at 120 km an hour, how long will it take to pass completely through the tunnel?

Accidentally, two trains are running in the opposite direction and enter a tunnel that is 200 miles long. A supersonic bird that has fled the lab and taken shelter in the tunnel starts flying from one train towards the other at a speed of 1000 mph. As soon as it reaches the second train, he starts flying back to avoid collision and meets the first train again at the other end. The bird keeps flying to and fro till the trains collide with each other.

What is the total distance that the supersonic bird has traveled till the trains collided?

John decided to give his bike 3 coats of paint. Which coat would go on the first?